JP2998788B2 - Theta for printing machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheeter for a printing press, and more particularly, to a printing web fed from a rotary printing press or a web fed from a stock roll to a predetermined length, and cuts the cut paper at a high speed. The present invention relates to a theta that can be transported to a stack unit and stacked.

[0002]

2. Description of the Related Art The final stage of a web offset printing press includes:
A sheeter device that cuts a print web fed from a printing press unit into a predetermined length to form a single-wafer sheet, decelerates this, feeds the stack to a stack unit, and sequentially stacks is installed online or offline. . This theta device applies a tension to the cut section that cuts the print web conveyed at a high speed at the printing speed, so that the cut length at this cut section does not vary, and also stacks the paper at the subsequent low-speed section. A high-speed transport unit that transports at a speed slightly higher than the printing speed to take timing, etc., and a low-speed transport unit that reduces the transport speed to a speed that does not affect lamination for lamination to the final stack unit. It has.

In this type of theta, there is a problem of a deceleration process for transferring a cut sheet from a high-speed transport section to a low-speed transport section. Conventionally, the leading end of the cut sheet discharged from the high-speed transport section contacts the low-speed transport section. In general, a method is adopted in which a cut sheet that is bent and conveyed is aligned while being received by a deceleration roll (squaring roll) and placed on a low-speed conveyance unit, and then conveyed by the low-speed conveyance unit. For this reason, the high-speed transport belt is arranged on the exit side of the cut section, and the low-speed transport belt is arranged in parallel with the high-speed transport belt, and the reduction roll is arranged almost at the upper center position of the low-speed transport belt. . The stacking section is arranged in series at the discharge end of the low-speed belt, and the stacking section has a lifting table arranged in a space surrounded by a regulating plate (jogger) arranged along the four sides of the cut sheet. It is structured so that cut paper discharged at low speed is stacked and received. Therefore, the cut sheet decelerated from the high-speed belt by the deceleration roll and transferred onto the low-speed transport belt is discharged from the low-speed belt, supplied to the stack portion, and stacked on the upper surface of the previously stacked cut sheet. .

FIG. 14 is a schematic diagram showing a conventional rotary printing press sheeter. Theta 10 includes a cutting unit 14, a high-speed transport unit 16, and a low-speed transport unit 1 along a flow direction of a print web 12 sent from a print unit (not shown).
8 and a stack unit 20. The printing web 12 from the printing unit is introduced into the cut section 14 through a plurality of guide rolls 22. At the entrance of the cut section 14, a draw roll 24 and a press roll 2 which is in contact with the draw roll 24 are provided.
6 are provided. The draw roll 24 is driven to rotate at a speed slightly higher than the printing cylinder of the printing unit, and the cutting unit 14 cuts the web 12 at a speed slightly higher than the printing speed and conveys the web 12 to the subsequent stage.

[0005] The printing web 12 fed from the draw roll 24 is introduced into the cutting section 14, which is constituted by a fly knife 30 rolled on the upper surface of the printing web 12 and a fixed knife arranged on the lower surface. Have been. The fly knife 30 is provided with knives at one or two locations on the outer peripheral portion of the knife cylinder, and cuts the print web 12 to a predetermined length at a peripheral speed higher than the transport speed of the print web 12. As a result, the cut sheet is discharged from the cut section 14.

A high-speed transport section 16 and a low-speed transport section 18 are continuously arranged from the exit of the cut section 14 in the direction of paper flow. It comprises a high-speed tape means 32 and a lower low-speed tape means 34. An upper pressing tape 36 is provided on the upper surface of the cut sheet fed by the high-speed and low-speed tape means 32, 34.

The lower high-speed tape means 32 includes a pair of rolls 3.
The transport tape 32T is wound around between 2A and 32B, and the transport tape 32T is driven to rotate at a speed higher than the printing speed (the transport speed of the print web 12) by using the outlet roll 32B as a drive roll. The cut sheets discharged from the cut section 14 are spaced from each other. Similarly, the lower low-speed tape means 34 is formed by winding a transport tape 34T between a pair of rolls 34A, 34B, and using the transport tape 34T as a drive roll and cutting the transport tape 34T into the stack unit 20. Circular driving is performed at a low speed so that feeding is possible. The upper pressing tape means 36 disposed on the upper surface of the lower high-speed tape means 32 and the lower low-speed tape means 34 faces each other so that a paper conveyance gap is formed between the high-speed tape means 32 and the low-speed tape means 34.
The surface of the cut paper conveyed on the tape means 32, 34 is pressed, and the cut paper is driven to rotate at a conveyance speed corresponding to the conveyance speed of the high-speed tape means 32.

[0008] The cut paper is formed by the above-mentioned tape means 32, 34,
In order to shift from the high-speed state to the low-speed state, a speed reduction roll 40 is provided on the upper pressing tape means 36 side in a portion facing the low-speed tape means 34. The deceleration roll 40 receives the leading end of the cut paper conveyed at a high speed in a gap between the cut paper and the low-speed tape means 34, and transfers the cut paper to the low-speed tape means 34 side to reduce the speed. It is configured to be rolled on the surface of the substrate 34 with a light contact pressure.

The low-speed tape means 34 is driven by the speed reduction roll 40.
The cut paper transferred to the nip roll 42 is transported at the speed of the low-speed transport tape at the tip of the tape means 34.
While being suppressed by the above, it is discharged to the stack unit 20, where it is stacked and piled.

[0010]

However, in the conventional theta, the cut sheet continuously fed from the high-speed tape means 32 is received by the reduction roll 40, and the cut sheet preceding the conveying surface of the lower low-speed tape means 34 is cut. The paper is partially overlapped on the paper to form a tiled roof and transported. In such a mode of conveyance by the low-speed tape means 34, the upper and lower cut sheets are brought into close contact with each other by static electricity, and when supplied to the stack section 20 at the subsequent stage, the paper ends are aligned from the tiled state and stacked vertically. Thus, there is a problem that it is difficult to slide cut papers together. In the stack section 20, the end faces are aligned by a jogger. However, since the stack section 20 is carried in a state of being electrostatically contacted, the end faces cannot be smoothly and quickly aligned.

The present invention focuses on the above-mentioned conventional problems and, in the transporting process from the cutting of the print web to the piling, in particular, when cutting from the high-speed tape means to the low-speed tape means, cutting paper preceding and following the cut paper. It is an object of the present invention to provide a sheeter for a printing press capable of effectively removing electrostatic adhesion between cut papers to be stacked.

[0012]

In order to achieve the above object, a sheeter for a printing press according to the present invention comprises a lower high-speed tape and a lower low-speed tape on the exit side from a cutting section for cutting a web into sheets. A printing press sheeter that is arranged in tandem along the transport direction, arranges an upper high-speed tape along the upper surface of the transported cut paper, and provides a stack of cut papers on the discharge end side of the lower low-speed tape. The lower high-speed tape, the lower low-speed tape, and the upper high-speed tape are provided with suction means, and cut-paper passing means is provided between the tapes. The lower end of the lower-speed tape is provided with static electricity removing means arranged so as to be able to hold the bottom of the paper, and cut paper is provided immediately before the static electricity removing means. The air blowing unit direction is directed blowing in the conveying direction is provided, it is characterized in that which enables blowing the ions cut paper overlay gap portion generated by the static electricity removing means.

[0013]

According to the above construction, when the cut sheet cut and discharged at the cutting section is transferred from the high-speed tape means to the low-speed tape means, corona discharge is generated near the static elimination electrode of the static elimination bar. Blow air blows out the positive ions and negative ions in the direction of paper transport to neutralize and remove the static electricity that has accumulated on the paper, and cuts the cut paper passed from the upper high-speed tape to the lower low-speed tape. Air is blown into a gap between the subsequent cut paper and the cut paper, and an air layer is formed between the cut papers stacked in a tiled manner on the low-speed tape means. As a result, the static electricity between the cut sheets introduced into the stack portion is neutralized and the close contact action is eliminated, the slip between the cut sheets becomes smooth, and the end face aligning action is performed quickly. Therefore, it is possible to shorten the time from the cutting to the supply to the stack portion, and to improve the efficiency of theta work.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view showing the overall configuration of a printing press theta according to the embodiment. Theta 100 according to the embodiment includes a printing unit (not shown).
A cutting section 104, a lower high-speed tape section 106, an upper high-speed tape section 108, a lower low-speed tape section 110, and a stack section 112 are provided along the flow direction of the print web 102 sent from the printer. The print web 102 from the printing unit is introduced into the cut section 104 via a plurality of guide rolls. At the entrance of the cut section 104, a draw roll 114 and a press roll 116 which is in contact with the draw roll 114 are provided.
Is provided. The draw roll 114 is driven to rotate in accordance with the printing speed of the printing unit, and
4, the web 102 is cut at the same speed as the printing speed.
4 is supplied.

The printing web 102 sent out from the draw roll 114 is introduced into the cutting section 104, which is a fly knife 1 which is rolled on the upper surface of the printing web 102.
18 and a fixed knife 120 disposed on the lower surface. The fly knife 118 is provided with knives at one or two locations on the outer peripheral portion of the knife body, and cuts the print web 102 to a predetermined length at a peripheral speed higher than the transport speed of the print web 102. . As a result, the cut sheet is discharged from the cut unit 104.

Conveying means are tandemly arranged in the direction of paper flow from the exit of such a cutting section 104, and are arranged on the lower surface of the cut paper and are a lower high-speed tape means for conveying while suctioning the lower surface of the paper. And the upper high-speed tape unit 10 to which the cut paper sent from the lower high-speed tape unit 106 is delivered and conveyed while sucking the upper surface of the cut paper.
8, and a lower low-speed tape unit 110 which delivers the cut sheet conveyed by the upper high-speed tape unit 108 and conveys the cut paper again in the state of suction on the lower surface. That is, the cut sheet continuously takes each mode of the lower surface suction high-speed transport, the upper surface suction high-speed transport, and the lower surface suction low-speed transport,
The transport path moves from the exit of the cutting section 104 to the stack section 112.

As shown in detail in FIGS. 2 and 3, the lower high-speed tape means 106 includes a plurality of transport tapes 106 between a pair of rolls 106A and 106B arranged on the inlet side and the outlet side.
T is wound around and a tension roll 106C for applying tension is provided in the middle of the tape return transport path. The transport tape 106T is a roll 106 on the exit side.
B is used as a driving roll to be driven to rotate.
, And can be driven to rotate at a high speed that is set faster than that of the sheet, and the cut sheets discharged from the cutting unit 104 are conveyed with a gap so as not to overlap each other. The drive roll 106B on the outlet side is rotated by a belt drive on a pulley 128 attached to the end of the roll shaft, and is attached to the frame side plate 130 so as to wind around the roll pulley 128 at a predetermined winding angle. Driving pulley 132 and reversing pulley 134,
Drive unit 13 that rotates around the intermediate pulley 136
8 is driven to rotate.

The cut paper transport surface of the lower high-speed tape means 106 is the outer surface of a plurality of transport tapes 106T moving from the inlet roll 106A toward the outlet roll 106B. A vacuum box 140 is provided between the pair of rolls 106A and 106B to form a sliding surface of the tape 106T so as to carry the tape. The vacuum box 140 is formed as a hollow container, and a suction duct 142 provided at the lower left and right positions is connected to a suction pump (not shown) so that the inside can be brought into a negative pressure state. A plurality of long holes 144 are opened in each tape sliding surface region of the vacuum box 140, and the long holes 144 are covered by the back surface of the transport tape 106T.
A plurality of suction holes 146 are opened over the entire length of each tape 106T. Thereby, the tape 10
When 6T slides on the sliding surface of the vacuum box 140, the negative pressure of the vacuum box 140 is reduced by the suction through hole 146.
Acts on the back surface of the cut sheet conveyed through the tape, and the cut sheet is suction-conveyed together with the tape in a state of being suction-contacted to the tape 106T.

A nip roll 147 is rolled in contact with the inlet-side roll 106A of the lower high-speed tape means 106, and the leading end of the cut paper discharged from the cutting section 104 is introduced into the lower high-speed tape means 106 to smoothly. High-speed suction transfer is possible. Also, at the exit of the lower high-speed tape means 106, the next upper high-speed tape means 10
The lift guide 148 obliquely intersects the gap between the tape means 106 and 108 as a means for delivering the cut sheet to the tape 8.
Is provided. This is the vacuum box 14
0 is bent obliquely toward the front in the paper feeding direction, and the leading end protrudes from the gap between the tapes 106T to the upper surface of the transport surface, and the protruding leading end is formed in an arc shape. And is formed so as to follow the outer peripheral surface of the outlet side roll 106B. The tip bending portion obliquely traverses the gap between the upper high-speed tape means 108.

Next, the upper high-speed tape means 108 which receives the cut paper transported by the lower high-speed tape means 106 and transports the cut paper at a high speed while sucking the upper surface of the cut paper is constructed as follows. As shown in FIG. 1 and FIGS. 4 to 7, the upper high-speed tape means 108 includes a main high-speed tape means 108X and an extended high-speed tape means 108Y.
It is composed of First, the main high-speed tape unit 1
08X has an entrance-side roll 108A and an exit-side roll 108B arranged along the cut sheet conveyance surface.
The entrance-side roll 108A is located immediately above the front end portion of the vacuum box 140 of the lower high-speed tape unit 106, and is arranged such that a part of the transport tape 108T overlaps the transport surface of the lower high-speed tape unit 106. The cut sheet lifted by the above-described lift guide 148 can be received. Also, the exit side roll 10
8B is located at the entrance of the stack section 112,
Here, the cut paper conveyed at a high speed is directly transferred to the stack unit 112.
It can be supplied to In order to circulate the transport tape 108T, an intermediate roll 108C and a driving roll 108D which are supported at the upper edge of the frame side plate 130 so as to be located above the rolls 108A and 108B are arranged. A transport tape 108T is wound therebetween. The drive roll 108D has a pulley 108DP provided at the end of the roll shaft driven by a belt (not shown) to drive the pulley 108DP so as to directly apply a circling drive force to the transport tape 108T wound around the drive roll 108D. The transport speed of the main high-speed tape unit 108X is set to be equal to that of the lower high-speed tape unit 106 at the preceding stage, and therefore, it is possible to circulate at a transport speed slightly higher than the printing speed.

Next, the extended high-speed tape means 108Y constituting the upper high-speed tape means 108 is, as shown in FIGS.
08T, and is extended so as to reach a position near the front jogger 112F so as to cover the entire surface of the stack portion 112. That is,
A plurality of transport tapes 108T are arranged side by side in the theta width direction.
8TE, which is wound around the extended outlet roll 108BE provided at a position reaching the front jogger 112F of the stack portion 112, and is wound around the intermediate roll 108CE supported by the frame side plate 130 immediately above. The inlet roll 108A and the drive roll 108D are commonly used.

The cut paper transport surface of the upper main high-speed tape means 108X is a downwardly facing outer surface of a plurality of transport tapes 108T moving from the entrance roll 108A to the exit roll 108B. A pair of rolls 108A, 108
A vacuum box 150 that forms the sliding surface of the tape 108T is provided between the positions B and B. This vacuum box 150 is formed as a hollow container as in the case of the lower high-speed tape means 106, and a suction duct 152 provided at the upper portion of the box is connected to a suction pump (not shown) so that the inside can be made in a negative pressure state. . A plurality of long holes 154 are opened in each tape sliding surface area of the vacuum box 150, and these long holes 154 are covered by the back surface of the transport tape 108T. A plurality of suction holes 156 are opened over the entire length of each tape 108T. Thereby, the tape 108T
Slides on the sliding surface of the vacuum box 150,
The negative pressure of the vacuum box 150 acts on the surface of the cut sheet to be conveyed through the suction through hole 156, and the cut sheet is suctioned and conveyed together with the tape 108T while being in close contact with the tape 108T.

The extended high-speed tape means 108Y is also constructed so as to be capable of sucking and conveying similarly, and has a vacuum box 151 independent of the vacuum box 150. This vacuum box 1
51 is also formed as a hollow container, as in the case described above,
The suction duct 153 provided at the upper part of the box is connected to a suction pump (not shown) so that the inside can be brought into a negative pressure state. A tape sliding surface made of a strip is formed on the lower surface of the vacuum box 151, and a plurality of long holes 155 communicating with the vacuum box 151 are opened in each tape sliding surface area. The transport tape 108TE is covered by the back surface. Each tape 108TE has a plurality of suction holes 156 opened over its entire length. As a result, the tape 108TE is placed in the vacuum box 150, 1
When sliding on the sliding surface 51, the vacuum box 15
The negative pressure of 0, 151 acts on the surface of the transport cut paper through the suction through hole 156, and the cut paper is
8TE is suction-conveyed together with the tape in a state in which the tape is in close contact with 8TE.
The suction conveyance by 08TE is also possible.

The above-mentioned upper high-speed tape means 108 is constructed so that the upstream and downstream sides of the transport can open the transport surface, respectively. Therefore, a front arm 158 and a rear arm 158 which can swing up and down along the inner surface of the frame side plate 130 are provided. 160 are supported by the frame side plate 130 via the same rotation fulcrum 162. The front arm 158 has an entrance-side roll 108A attached to the tip, and the rear arm 160 has an exit-side roll 108B and an extended exit-side roll 108BE attached. Each arm 158, 16
The rod ends of the lifting / lowering cylinder mechanisms 164 and 166 installed on the frame side plate 130 are connected to each of the reference numerals 0. By driving the cylinder mechanisms 164 and 166 to lift, the respective tips of the arms 158 and 160 are raised. The transfer line surface can be opened. In addition, the transport tapes 108T,
108TE so that the transport tape 10 is not loosened.
A tension roll 168 is provided in the middle of the 8T, 108TE round route. In this example, drive roll 1
Tension roll 16 so as to be located directly above 08D.
The tension roll 168 is pulled by the air cylinder 170 while the tension roll 168 is in contact with the tape 108T, 108TE so that the winding angle around the drive roll 108D circumscribing the tape 108T, 108TE is increased. It is. The tension roll 168 is supported by a bent portion of a bell crank 172 attached to the frame side plate 130 so that the tension roll 168 can be pulled, and the bell crank 172 is set to be rotatable. Can be pulled by the air cylinder 170 in the tension applying direction.

In such an upper high-speed tape means 108, a lift guide 148 is provided from the lower high-speed tape means 106.
Is transported by suction, but since the transport speeds of the high-speed tapes 106T, 108T, and 108TE are the same, the cut sheets are moved one by one without overlapping, and the stack portion 112 is moved. It can be poured and supplied at high speed sequentially to the upper part of. The transport line formed by the lower high-speed tape unit 106 and the upper high-speed tape unit 108 is set so as to have a downward slope toward the downstream side. The part side can be poured.

When the cut paper is supplied directly from the upper high-speed tape unit 108 to the stack unit 112, the leading end of the paper is damaged. Therefore, the transport speed is reduced. Is transferred to the lower low-speed tape means 110. This is because the leading end side of the cut sheet sucked and conveyed at a high speed by the upper high-speed tape means 108 flows into the upper portion of the stack portion 112 by the extended high-speed tape means 108Y, and the bottom of the cut sheet adsorbed to the main high-speed tape means 108Y. The forcible part is forcibly separated, and the trailing edge of the paper is delivered to the lower speed tape means 110.
The cut sheet delivery means is constituted by a snapper roll 174, which is disposed immediately before the outlet side roll 108B in the main high speed tape means 108X of the upper high speed tape means 108, as shown in FIG. It is formed by a brush that rotates using a gap between 108T and 108TE. That is, a rotating shaft 176 parallel to the roll 108B is passed between the left and right rear arms 160 immediately before the outlet roll 108B, and the mounting block 178 is fixed to the rotating shaft 176. The mounting block 178 is the rotating shaft 1
It is composed of a pair of rectangular block joints having a semicircular groove conforming to 76, and a separation brush 180 is attached to the outer edge of one of the blocks. The separation brush 180 is used for the plate 1 attached to the block 178.
The brush fibers 180B are planted in almost half of the 80A, so that the base of the brush fibers 180B precedes in the rotation direction (cut paper transport direction), and the fiber tip, that is, the contact front to the cut paper follows in the rotation direction. In addition, the turning radius is oblique. The tip rotation trajectory of the separation brush 180 protrudes from the conveyance surface of the upper main high-speed tape means 108X, and the length of the protrusion is within a range where the suction action on the conveyance tapes 108T and 108TE does not reach when the cut paper is separated. At the same time, the size may be set so as to be in contact with the transport surface to the lower lower speed tape means 110. Not only the brush type but also a nail type can be used. Such a snapper roll 174 is rotated by driving a pulley 176P attached to the base end of the rotating shaft 176, and is rotated.
Contacts the low-speed tape means 110 only once during one rotation. The contact timing is such that the leading end of the cut sheet conveyed by the upper high-speed tape
Of the main high-speed tape means 10
This is performed when the front end of the 8X vacuum box 150 is reached. This contact timing can be realized by rotating the rotating shaft 176 so as to have a predetermined number of revolutions according to the transport speed of the high-speed tape means 108, and the driving pulley 1 for driving the pulley 176P by a belt.
What is necessary is just to adjust the phase with 82, and set it so that it may become the said timing. The tip rotation locus of the snapper roll 174 protrudes from the front end of the vacuum box 150 toward the transport surface, contacts the transport surface of the low-speed tape unit 110, and is drawn in through the output roll 108B. , So that the separating action is not performed in the portion other than the bottom of the paper.

When the cut paper is transferred by the snapper roll 174, the extended high-speed tape
08Y, the cut paper cannot be separated if it is in the suction state. Therefore, when the snapper roll 174 tries to separate the trailing edge of the cut paper, the suction operation performed through the vacuum box 151 on the extended high-speed tape means 108Y side. I try to shut it off. The details are shown in FIGS. Vacuum box 151 is extended transport tape 10
It is formed as a cylindrical box along 8TE, which is provided by the number of the extension transport tapes 108TE. As described above, a long hole 155 for suction is formed in a sliding surface member formed of a strip formed on the lower surface of the cylindrical vacuum box 151. An open / close valve mechanism 200 is formed inside the cylindrical vacuum box 151. The opening / closing valve mechanism 200 has a rotating rod 202 rotatably supported inside the cylindrical vacuum box 151, and has one end of the rotating rod 202 protruding from the end of the box 151. A valve pulley 204 is attached to the protruding end, and can be rotated by driving a belt. Belt 206
9, is wound around a drive pulley 208 attached to a rear arm 160, and is also wound around a plurality of valve pulleys 204. Each valve pulley 204 is set so as to rotate in synchronization. ing.
On the other hand, the rotary rod 202 inserted into each cylindrical vacuum box 151 has flat portions at its plurality of positions corresponding to the suction holes 155 such that the outer edges can rotate and slide on the cylindrical inner peripheral surface. The valve 210 is provided at the outer edge. That is, the rotation of the rotating rod 202 causes the flat plate portion to rotate, and the valve 210 provided on the edge of the flat plate portion rotates the long hole 15.
5 is closed when it faces the communicating hole to 5, so that the suction negative pressure does not act on the transport tape 108TE.
As described above, the timing of cutting off the suction negative pressure coincides with the time when the snapper roll 174 tries to separate the trailing edge of the cut sheet, and the extended high-speed tape unit 108Y
The suction operation performed through the vacuum box 151 on the side is cut off.

Further, the extended high-speed tape means 108Y includes:
When the snapper roll 174 transfers the cut paper sucked and conveyed to the upper portion of the stack section 112 to the lower low-speed tape unit 110, the extended high-speed tape unit 1
Auxiliary snapper rolls 174A, 174 that are separated from the conveying surface of the 08Y and forcedly separated toward the stack portion 112.
B is provided. This is shown in FIG.
It is provided in the suction area of the cylindrical vacuum box 151, has the same configuration as the snapper roll 174, and is set to have the same separation timing. Therefore, the forcible separation action by the auxiliary snapper rolls 174A and 174B is performed in conjunction with the suction cutoff by the vacuum box 151.

The lower low-speed tape means 110 for receiving the cut sheet by the action of the snapper roll 174 on the main high-speed tape means 108X side is disposed immediately before the stack section 112 and faces the downstream area of the upper high-speed tape means 108. . This specific configuration is shown in FIGS. The lower low-speed tape means 110 has a single roll 110A arranged at the upstream end, and a pair of upper and lower small-diameter rolls 110B and 110C arranged at the paper discharge side and formed smaller than the diameter of the upstream end roll 110A. The transport tape 110T is wrapped around these, and the upper small-diameter roll 110B is brought closer to the entrance of the stack portion 112 than the lower small-diameter roll 110C, so that the low-speed tape 110
The shape of the front end of T is set to be a knife edge shape. That is, although the small-diameter rolls 110B and 110C have the same diameter, this is because the upstream-end roll 110A
Are formed as rolls having a diameter of about 40% or less of the diameter of the paper, and are arranged vertically in parallel at the discharge end. The upper and lower small-diameter rolls 110B and 110C are arranged so as to be shifted back and forth by an amount substantially equal to the roll diameter, and the upper small-diameter roll 110B is located at the upper edge of the rear jogger 112R that defines the accommodation area of the stack portion 112. The outer surface of the tape 110T wound around the rear jogger 112R is set to coincide with the inner surface of the rear jogger 112R, and the outer surface of the tape 110T wound around the upper small-diameter roll 110B faces the stack portion 112, so that no gap is formed between the tape 110T and the accommodation portion. Like that. Also, the lower small diameter roll 110
C is arranged at an interval from the rear surface of the rear jogger 112R so as not to interfere with the transport tape 110T.

The cut sheet conveying surface of the lower low-speed tape means 110 is an upward outer surface of a plurality of conveying tapes 110T moving from the upstream end roll 110A to the upper small-diameter roll 110B on the discharge end side. However, the pair of rolls 1 is so arranged that the transfer surface performs suction transfer.
A vacuum box 184 that forms a sliding surface of the tape 110T is provided between 10A and 110B. This vacuum box 184 is formed as a hollow container as in the case of the lower high-speed tape means 106, and a suction duct 186 provided at the lower part of the box is connected to a suction pump (not shown) so that the inside can be made in a negative pressure state. . A plurality of long holes 188 are opened in each tape sliding surface area of the vacuum box 184.
88 is covered by the back surface of the transport tape 110T. A plurality of suction holes 190 are opened over the entire length of each tape 110T. Thus, when the tape 110T slides on the sliding surface of the vacuum box 184, the negative pressure of the vacuum box 184 acts on the back surface of the transport cut sheet through the suction through hole 190, and the cut sheet is suction-adhered to the tape 110T. In this state, it is sucked and transported together with the tape.

The transport tape 110T is driven to rotate by rotating the upstream end roll 110A, which is of a belt drive type. As shown in FIG. 10, a roll pulley 192 is wound therearound. Belt 19
4 through the drive pulley 196. A continuously variable transmission (not shown) is provided on the drive pulley 196 side so that the transport speed of the transport tape 110T can be arbitrarily adjusted. By this adjustment, the feeding speed of the low-speed transport surface to the stack portion is adjusted, and the overlap amount between cut sheets can be changed.

Incidentally, the rear jogger 112R for regulating the accommodation area of the stack portion 112 is attached to the vacuum box 184. That is, as shown in FIG. 12, the rear jogger 112R is formed by a strip-shaped plate hanging down from a gap between the plurality of transport tapes 110T, and the vacuum box 18R.
4 is attached to a bracket 191 fixed to the bracket 4. A vibrator 193 (see FIG. 1) is attached to a part 112R 'of the plurality of rear joggers 112R so as to vibrate a pile of cut sheets housed in the stack unit 112 to align the end faces. Rear jogger 11
The front surface of the 2R is, as described above, a transport tape 110T.
Are set so as to be on the same plane as the front edge of the front end.

The cut paper conveyed by the upper high-speed tape means 108 flows into the stack section 112 in a high-speed conveying state, and at the same time, is reliably sucked and conveyed to the upper surface of the stack section 112 by the extended high-speed tape means 108Y. Immediately before the bottom of the paper exits the high-speed suction area of the upper high-speed tape unit 108, particularly the main high-speed tape unit 108X, it is delivered to the lower low-speed tape unit 110 by the snapper roll 174, and at the same time, the suction of the extended high-speed tape unit 108Y is cut off. And an auxiliary snapper roll 1
It is separated from the extended conveyance surface by 74A and 174B.
As a result, the lower low-speed tape means 110 can suck and convey the trailing edge of the paper and convey the cut paper at a reduced speed. The cut paper conveyed by the lower low-speed tape unit 110 is sent to the stack unit 112,
2, a rear jogger 112R attached to the vacuum box 184 of the lower low-speed tape means 110;
The front and rear regions are defined by the front jogger 112F disposed facing the front jogger 112F, and the side joggers 112S attached to the left and right frame side plates 130.
Defines left and right regions. Stack unit 112
Has a table 195 that moves up and down in a storage space surrounded by the joggers 112R, 112F, and 112S, and piles the cut sheet conveyed on the table 195.

The front jogger 112F and the side jogger 112S of the stack section 112 are also provided with a vibrator 198 so as to align the end faces of the cut paper pile.

In addition to such a configuration, in this embodiment,
As shown schematically in FIGS. 1 and 10 and in detail in FIG. 13, an electrostatic removal bar 212 is arranged immediately before the lower low-speed tape means 110, and an air nozzle pipe 214 is arranged adjacent thereto. are doing. The static elimination bar 212 and the air nozzle pipe 214 are located below the conveying surface of the upper high-speed tape unit 108,
0, and is disposed so as to traverse the transfer line at substantially the same row as the transfer surface. As shown in FIG. 10, the static elimination bar 212 is discharged from the discharge needle 216 through the opening on the upper surface of the case.
And arranged at regular intervals in the longitudinal direction. Corona discharge is generated near the discharge needle 216 to generate positive ions and negative ions. Further, the air nozzle pipe 214 is connected to the static elimination bar 212.
Of the discharge needle 216
The air is blown out from the upstream position in the transport direction adjacent to the paper in the flow direction of the transport cut paper. For this reason, the outlet 2 pierced in the air nozzle pipe 214
14A is inclined obliquely upward, and the air is
Along with the lower surface of the cut sheet that is being sucked and moved by 08, it is poured into the paper transfer portion of the lower low-speed tape means 110. A plurality of air outlets are provided along the width direction of the transport line so as to reach the entire surface of the cut sheet to be transported. Therefore, when the paper edge of the cut sheet is transferred from the upper high-speed tape unit 108 to the lower low-speed tape unit 110 by the snapper roll 174, the positive ion is blown between the transferred cut sheet and the succeeding cut sheet by air blow. Then, air containing negative ions is introduced, the static electricity of the paper is removed, and an air layer is formed between the cut sheets. Therefore, when being supplied from the lower low-speed tape means 110 to the stack section 112, it is conveyed at a low speed and is continuously poured into the stack section 112 in a tiled manner, but an air layer intervenes in the overlap portion. When the papers are introduced into the stack portion 112, the papers slide smoothly, and the end faces are quickly aligned.

In the printing press sheeter constructed as described above, the cut paper cut into a predetermined size in the cutting section 104 is first introduced into the lower high-speed tape means 106, where the lower surface is sucked and the high-speed is cut. Conveyed at tape speed. A lift guide 148 is provided on the discharge end side of the lower high-speed tape unit 106, and the cut sheet being conveyed is guided by the lift guide 148 and introduced into the upper high-speed tape unit 108 side. Upper high-speed tape means 108
The main high-speed tape unit 108X to the entrance of the stack unit 112 and the extended high-speed tape unit 108Y adapted to cover the upper surface of the stack unit 112 allow the suction conveyance mechanism to reach a position where the stack unit 112 can be almost loaded. Therefore, the cut sheet is transported at a high tape speed while the upper surface is sucked. A snapper roll 17 provided near the discharge end of the upper main high-speed tape means 108X.
Reference numeral 4 acts to separate the cut sheet from the transport surface when the trailing edge of the cut sheet reaches the front end of the suction area. At the same time, the suction action of the extended high-speed tape means 108Y stops,
The auxiliary snapper rolls 174A and 174B are the stack unit 1
Push the cut paper away toward 12. For this reason, most of the cut sheet is delivered to the lower low-speed tape means 110 in a state where the cut sheet has been sent above the stack portion 112, and only the trailing end portion of the cut sheet is in the suction state. The lower low-speed tape means 110 sucks the trailing edge of the cut sheet delivered from the snapper roll 174 to perform a braking action, and supplies the cut sheet at a reduced speed to the stack unit 112 to be stacked on the elevating table 195.

In particular, in this example, the lower low speed tape means 1
In the front part of the apparatus 10, static electricity is removed from the cut sheet in the transport state by the static electricity removing bar 212, and the air blown out from the air nozzle pipe 214 is added when the cut sheet is delivered to the lower low-speed tape means 110. The ions and the negative ions are blown out in the transport direction to neutralize and remove the static electricity of the paper, and an air layer is formed between the papers which are conveyed while being overlapped on the lower low-speed tape means 110 in a tiled manner.

When the lower low-speed tape means 110 sucks the trailing edge of the cut sheet to perform a braking action, and when the reduced speed is supplied to the stack unit 112, the lower low-speed tape means 11
0 is set to have a knife-edge shape, and the upper small-diameter roll 110B is positioned at the upper edge of the rear jogger 112R that defines the storage area of the stack 112. Since there is no gap with the storage section, the occurrence of paper jam can be prevented. Further, since only the bottom edge of the cut sheet is transferred from the upper high-speed tape unit 108 to the lower low-speed tape unit 110 by the snapper roll 174, the leading end of the paper passes through the entrance of the stack unit 112. Therefore, it is possible to smoothly supply the stack portion 112 at a low speed particularly smoothly.

For this reason, in the printing press sheeter, most of the cut paper is sent to the stack section 112 by high-speed conveyance by suction of the lower surface and high-speed conveyance by suction of the upper surface, and the low-speed conveyance tape means 110 cuts the cut paper. When the cut paper is transferred from the high-speed tape means 108 to the lower low-speed tape means 110, an air layer is formed between the cut papers by air blowing while removing the cut paper from the high-speed tape means 108 to the lower low-speed tape means 110. Low speed tape means 110
Is supplied to the stack unit 112 by the
12, the end face alignment of the cut sheet becomes extremely good. Further, in this embodiment, since the paper can be conveyed at a high speed to the pile position while leaving the trailing edge of the paper, the conveyance time can be greatly reduced and the low-speed conveyance distance by the low-speed conveyance tape means 110 can be shortened. As a result, the effect of shortening the piling time is high, and the low-speed transport region is short, so that the overall length of the theta can be shortened. The transfer of the cut sheet from the low-speed transport tape unit 110 to the stack unit 112 is performed by the snapper roll 174 and the extended high-speed tape unit 10.
This is performed by the auxiliary snapper rolls 174A and 174B of the 8Y portion. Since the bottom portion of the paper is transferred to the lower low-speed tape unit 110, the leading end of the cut sheet does not get caught at the joint between the low-speed transport tape unit 110 and the stack unit 112, and paper jam does not occur. .
In the above embodiment, the lower high-speed tape means is suctioned and conveyed, but the conveyance in this portion may be simple tape conveyance. Further, the upper high-speed tape means 108 is constituted by an upper main high-speed tape means 108X and an extended high-speed tape means 108Y so as to perform suction conveyance at the upper surface of the stack section 112.
Can also be applied to those having a structure in which is omitted.

[0040]

As described above, according to the present invention, the lower high-speed tape and the lower low-speed tape are tandemly arranged in the conveying direction on the exit side from the cut section for cutting the web into sheets, and the web is conveyed. A high-speed tape is disposed along the upper surface of the cut paper, and a stacker for the cut paper is provided on the discharge end side of the lower low-speed tape, wherein the lower high-speed tape, the lower low-speed tape, and the upper The high-speed tape is provided with a suction unit and a cut-sheet transfer unit between the tapes is provided. The transfer unit from the upper high-speed tape to the lower low-speed tape is formed so as to press the bottom of the cut sheet, and the lower low-speed The static electricity elimination means is arranged at the front part of the tape, and the air blowing direction is directed to the cut paper conveyance direction immediately before this static electricity elimination means. Since the discharge means is provided and the ions generated by the static electricity removing means can be blown into the cut paper overlapping gap portion, during the transfer process from cutting of the print web to piling, particularly the transfer from the high-speed tape means to the low-speed tape means. In this case, an excellent effect that electrostatic adhesion can be effectively removed between a preceding cut sheet and a cut sheet stacked subsequently thereto is obtained.

[Brief description of the drawings]

FIG. 1 is an overall side view showing an outline of a printing press theta according to an embodiment.

FIG. 2 is a side view of a lower transport tape unit.

FIG. 3 is a partial plan view of the same.

FIG. 4 is an upstream side view of the upper high-speed tape means.

FIG. 5 is a partial plan view of the same.

FIG. 6 is a side view of the extended high-speed tape means.

FIG. 7 is a partial plan view of the same.

FIG. 8 is a side view and a sectional view for explaining a vacuum box and an opening / closing valve mechanism of the extended high-speed tape means.

FIG. 9 is an end view of the same.

FIG. 10 is a side view of the lower low speed tape means.

FIG. 11 is a partial plan view of the lower low-speed tape means.

FIG. 12 is a downstream end view and a partial side view of the lower low-speed tape means.

FIG. 13 is a side view and a plan view showing a configuration of an electrostatic removal bar and an air nozzle pipe.

FIG. 14 is a configuration diagram of a conventional theta.

[Explanation of symbols]

 100 theta 102 print web 104 cut section 106 lower high-speed tape means 106A inlet roll 106B outlet roll 106C tension roll 106T transport tape 108 upper high-speed tape means 108A inlet roll 108B outlet roll 108C intermediate roll 108D drive roll 108T transport tape 108DP Pulley 110 Lower low-speed tape means 110A Upper end roll 110B Upper small diameter roll 110C Lower small diameter roll 110T Transport tape 112 Stack section 112F Front jogger 112R Rear jogger 112R 'Rear jogger 112S Side jogger 114 Draw roll 116 Press roll 118 Fly knife 120 Fixed knife 128 Roll pulley 130 Frame side plate 132 Drive pulley 134 Reverseリ 136 Intermediate pulley 138 Belt drive 140 Vacuum box 142 Suction duct 144 Long hole 146 Suction through hole 147 Nip roll 148 Lift guide 150 Vacuum box 151 Cylindrical vacuum box 152 Suction duct 153 Suction duct 154 Long hole 155 Long hole 156 Suction through Hole 158 Front arm 160 Rear arm 162 Rotating fulcrum 164 Front lifting cylinder mechanism 166 Rear lifting cylinder mechanism 168 Tension roll 170 Air cylinder 172 Bell crank 174 Snapper roll 176 Rotating shaft 176P Pulley 178 Mounting block 180 Separation brush 180A plate 180B Brush fiber 18 Pulley 184 Vacuum box 186 Suction duct 188 Slot 190引透 hole 191 bracket 192 roll pulley 193 vibrator 194 belt 195 lifting table 196 driven pulley 200 on-off valve mechanism 202 rotates the rod 204 Barubupuri 206 belt 208 driving pulley 210 valve 212 static elimination bars 212A outlet 214 the air nozzle pipe 216 discharge needle

Claims (1)

(57) [Claims] 1. A lower high-speed tape and a lower low-speed tape are arranged in tandem along a conveying direction on an exit side from a cutting section for cutting a web into sheets, and an upper high-speed tape is arranged along an upper surface of a cut sheet conveyed. In a printing press sheeter having a tape disposed thereon and a stack of cut sheets provided on the discharge end side of the lower low-speed tape, the lower high-speed tape, the lower low-speed tape, and the upper high-speed tape are provided with suction means. A means for transferring cut paper between tapes, the means for transferring from the upper high-speed tape to the lower low-speed tape is formed so as to be able to press the bottom of the cut paper, and static electricity removing means is arranged at the front of the lower low-speed tape. At the same time, an air blowing means whose blowing direction is directed to the cut sheet conveying direction is provided immediately before the static electricity removing means. For a printing press, characterized in that to allow blowing generated ions cut sheet overlay gap section by means theta.